Roof Cleaning & Treatment
Our professional roof cleaning service is designed to remove unwanted biological growth while protecting the integrity of the roof covering. We work with a range of roof types — including concrete tiles, clay tiles and suitable natural or manufactured slate systems — selecting our methods according to their condition and construction.
What is roof cleaning, and who is it for?
Roofs are constantly exposed to the elements, making them particularly susceptible to moss, algae, lichen and environmental debris.
As these contaminants accumulate, they can significantly affect the appearance of a property. Heavy moss growth can also retain moisture, obstruct drainage routes and contribute to maintenance problems.
Our professional roof cleaning service is designed to remove unwanted biological growth while protecting the integrity of the roof covering.
We work with a range of roof types, including concrete tiles, clay tiles and suitable natural or manufactured slate systems, selecting our methods according to their condition and construction.
Common causes of roof contamination
- Moss — the most common issue, thriving in damp, shaded conditions.
- Algae and lichen growth.
- Environmental debris and organic material.
- Shade from trees and neighbouring buildings, and north-facing slopes that stay damp longer.
Relevant roof types and materials
- Concrete roof tiles.
- Clay roof tiles.
- Suitable natural or manufactured slate systems.
Our cleaning methods, equipment and chemicals
There is no single cleaning method suitable for every roof. We assess its construction, condition, accessibility and level of contamination before recommending a treatment.
Depending on the roof, our cleaning methods may include:
- Manual moss removal: Specialist scraping tools, selected to suit the tile profile, remove heavy moss accumulations.
- Low-pressure cleaning: Controlled cleaning equipment may be suitable for certain sound roof coverings following assessment.
- Biocidal treatments: Specialist treatments designed to control residual moss, algae and lichen and reduce subsequent regrowth.
- Softwashing: Carefully controlled chemical cleaning for suitable roof surfaces.
- Gutter clearance: Removal of moss and debris deposited in gutters during the cleaning process.
We avoid indiscriminate high-pressure roof cleaning, which can damage vulnerable roofing materials and disturb the roof covering.
Why method selection matters
Indiscriminate high-pressure roof cleaning can damage vulnerable roofing materials, disturb tiles and compromise surface finishes.
The correct approach depends on the roof's construction, the tile or slate material, its condition and the level of contamination. Manual removal followed by a targeted biocidal treatment is often the most appropriate method.
Roof cleaning does not repair damaged tiles or restore worn protective coatings — and we will identify visible concerns that may require attention from a roofing specialist.
What to expect and recommended cleaning frequency
The results depend on the original condition of the roof and the cleaning method selected.
Manual moss removal provides an immediate improvement, while follow-up biocidal treatments can gradually address remaining biological growth over subsequent weeks or months.
Recommended frequency: A professional roof inspection every 2–3 years is sensible for moss-prone properties. A full clean is generally only required when contamination warrants it — often approximately every 10 years depending on local conditions.
Preventative treatments help extend the period between major cleans.
Maintenance and aftercare
- Following a professional clean, we generally recommend an annual preventative biocide treatment to help keep biological growth under control.
- An ongoing maintenance programme gives the roof the best practical opportunity to remain clean without repeated major cleaning work.
- We can identify accumulated debris, blocked gutters or visible damaged tiles and bring them to your attention.
Knowledge Centre
Related Educational Articles
Read more about the surface, the contamination and the right approach.
Questions
Frequently Asked Questions
Roof Cleaning & Treatment
Request a Roof Cleaning Assessment
Tell us about the surface or issue and we will advise on the right approach for your property.
- 1The Issue
- 2Photos & Access
- 3Your Details